X = int(input())

if X//1800>=1:
    print(1)
    exit()
elif X//1600>=1:
    print(2)
    exit()
elif X//1400>=1:
    print(3)
    exit()
elif X//1200>=1:
    print(4)
    exit()
elif X//1000>=1:
    print(5)
    exit()
elif X//800>=1:
    print(6)
    exit()
elif X//600>=1:
    print(7)
    exit()
elif X//400>=1:
    print(8)
    exit() X = int(input()) X int(input()) int input() input if X//1800>=1:
    print(1)
    exit()
elif X//1600>=1:
    print(2)
    exit()
elif X//1400>=1:
    print(3)
    exit()
elif X//1200>=1:
    print(4)
    exit()
elif X//1000>=1:
    print(5)
    exit()
elif X//800>=1:
    print(6)
    exit()
elif X//600>=1:
    print(7)
    exit()
elif X//400>=1:
    print(8)
    exit() X//1800>=1 X//1800 X 1800 1 print(1) print 1 exit() exit elif X//1600>=1:
    print(2)
    exit() X//1600>=1 X//1600 X 1600 1 print(2) print 2 exit() exit elif X//1400>=1:
    print(3)
    exit() X//1400>=1 X//1400 X 1400 1 print(3) print 3 exit() exit elif X//1200>=1:
    print(4)
    exit() X//1200>=1 X//1200 X 1200 1 print(4) print 4 exit() exit elif X//1000>=1:
    print(5)
    exit() X//1000>=1 X//1000 X 1000 1 print(5) print 5 exit() exit elif X//800>=1:
    print(6)
    exit() X//800>=1 X//800 X 800 1 print(6) print 6 exit() exit elif X//600>=1:
    print(7)
    exit() X//600>=1 X//600 X 600 1 print(7) print 7 exit() exit elif X//400>=1:
    print(8)
    exit() X//400>=1 X//400 X 400 1 print(8) print 8 exit() exit X = int(input()) int(input()) X
X = int(input())

if X//1800>=1:
    print(1)
    exit()
elif X//1600>=1:
    print(2)
    exit()
elif X//1400>=1:
    print(3)
    exit()
elif X//1200>=1:
    print(4)
    exit()
elif X//1000>=1:
    print(5)
    exit()
elif X//800>=1:
    print(6)
    exit()
elif X//600>=1:
    print(7)
    exit()
elif X//400>=1:
    print(8)
    exit()